Pencil sharpener



April 7, 1931. 11 55 1,800,118

PENCIL SHARPENER Filed April 21, 1930 Ha Inventor A llorney Patented Apr. 7, 1931 PATENT OFFICE GERALD DEAN TUSSING, OF JEANNETTE, PENNSYLVANIA PENCIL SHARPENER Application filed April 21,

This invention relates to new and useful improvements in encil sharpeners and has for its primary ob ect to provide, in a manner as hereinafter set forth, a device of this character having means embodied in the construction thereof whereby the same may be expeditiously adjusted to accommodate pencils of different diameters.

Another important object of the invention is to provide a pencil sharpener of the aforementioned character which embodies an eraser which is detachably mounted thereon.

Other objects of the invention are to provide, in a manner as hereinafter set forth, a

pencil sharpener which will be simple in construction, strong, durable, efficient in its use and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of the invention may become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and

wherein Figure 1 is a view in elevation of a pencil sharpener constructed in accordance with this invention.

' Figure 2 is a longitudinal sectional view thereof.

Figure 3 is a sectional view taken substantially on the line 33 of Figure 2.

Figure 4: is a sectional view taken substantially on the line 44; of Figure 2.

Figure 5 is a fragmentary view, principally in longitudinal section showing a slightly modified form of the invention.

Referring to the drawings in detail, it will be seen that the reference numeral 1 designates a body portion which may be of any desired configuration, preferably cylindrical having formed on its upper end a reduced threaded shank 2 upon the upper end of which is disposed an eraser 3 having an integral flange ft on its lower end. An internally threaded ring 5 is threaded on to the shank 2 and is provided, at its upper end with an inwardly turned retaining flange 6 adapted to engage over the flange l of the 1930. Serial No. 446,072.

eraser 3 in a manner to securely clamp said eraser in position on the shank 2.

The body 1 is further provided with a substantially conical recess or bore 7 which has communication with one side of the said body 1 through the longitudinally extending slot 8 to one of the walls of which is adjustably secured the cutting blade 9 through the medium of the screw 10 which passes through a transverse slot formed in an intermediate portion of said blade 9. As clearly seen in Figure 2 of the drawing, the cutting edge of the blade 9 is disposed at an angle in conformity with the conical recess or socket T.

A reduced, threaded split sleeve 11 is formed on the lower end of the body portion 1 and threaded on said sleeve is the clamping ring 12 having the inwardly tapered free end portion 13 which is frusto-conical in form and adapted to engage with the free end of the furcations of the sleeve 11 in a manner to press the same together with the clamping ring 12 is threaded inwardly thereon.

When the clamping ring 12 is unthreaded from the sleeve 11, said sleeve will expand by reason of its inherent resiliency.

As will be obvious, a pencil of any diameter less than that of the free end portion of the clamping ring 12 may be inserted into the sharpener after which the element 12 is threaded inwardly on to the sleeve 11 in a manner to move the furcations thereof into snug engagement with the pencil. It will further beseen that the blade 9 may be adjusted to function properly with pencils of various sizes.

When the device is not being used as a sharpener, the blunt end of the pencil is inserted in the sleeve 11 and the clamping ring 12 is operated in a manner to securely clamp the device on the pencil. In this manner the sharpener is always at hand for use and in addition constitutes means for mounting an eraser on the pencil. This is a most important feature of the invention.

In the slightly modified form of the in vention illustrated in Figure 5, the upper end portion of the body 1 is provided with a threaded socket into which is threaded an eraser 14;, the socket being designated by the reference character 15. In all other respects the device disclosed in Figure 5 is the same as that illustrated in the remaining figures.

As will be apparent when the device is 5 mounted on the blunt end of a pencil, the

split sleeve 11 and the clamping ring 12 constitute a clutch which rigidly secures the sharpener on the pencil. As many longitudinal splits in the sleeve ll'may be provided as are necessary to impart to said sleeve the desired resiliency.

It is believed that the many advantages of a pencil sharpener constructed in accordance with this invention will be readily un- 15 derstood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction may be had which will fall within the scope of the invention as claimed.

What is claimed is A pencil sharpener of the character described comprising a body portion having a tapered socket, a cutting knife adjustably mounted on the body portion and extending into the tapered socket, a split externally threaded resilient sleeve formed integrally on one end of the body portion and communicating with the tapered socketysaid sleeve and the tapered Socket adapted for' the reception of a pencil and threaded means for pressing the free end portion of the sleeve into frictional engagement with the pencilina manner to secure the sharpener thereon against movement, said means comprising an internally threaded clamping ring having a tapered end portion operatively engaged with the free end of the sleeve.

In testimony whereof I aflix my signature.

40 GERALD DEAN russrne. 

